I HAVE A 2008 CHRYSLER 300 my problem is when I go to turn on the car I turn the key and it don't start right away I have to hold the key a couple of seconds for it to turn on then I let the key go.

Sometimes I turn the key, it turns on
quick ... Sometimes I turn the key
,hold it on a lil bit , and then let go,a
couple seconds later it turns on what
might the problem be ...is it a fuse , a
sensor ? A say a fuse or sensor
because when I first got the car I
needed a jump once and I didn't
know that the battery was in the
trunk not the front so I jump started it
from a positive post I found by a fuse
box it had a positive label on it do I
thought I would use that and i used
the metal body for ground and it
started the car in a weird way but
after that my car been acting funny
so any advice